/* ========================================================================
   Variables
   ======================================================================== */
:root {
  /* Colors */
  --color-background: #050b18; /* deep, trustworthy blue/indigo */
  --color-surface: #0c1524; /* elevated surface for cards/nav */
  --color-surface-alt: #101827;
  --color-text: #f9fafb; /* near white */
  --color-text-muted: #9ca3af; /* graphite gray */
  --color-border-subtle: #1f2933;
  --color-primary: #1e3a8a; /* deep blue */
  --color-primary-soft: #1d4ed8; /* accent blue for hovers */
  --color-primary-contrast: #f9fafb;
  --color-success: #22c55e; /* soft green accent */
  --color-success-soft: rgba(34, 197, 94, 0.12);
  --color-warning: #eab308;
  --color-warning-soft: rgba(234, 179, 8, 0.12);
  --color-danger: #ef4444;
  --color-danger-soft: rgba(239, 68, 68, 0.12);
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2933;
  --color-gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem; /* 36px */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px) */
  --space-0: 0;
  --space-1: 0.25rem; /* 4px */
  --space-2: 0.5rem; /* 8px */
  --space-3: 0.75rem; /* 12px */
  --space-4: 1rem; /* 16px */
  --space-5: 1.25rem; /* 20px */
  --space-6: 1.5rem; /* 24px */
  --space-8: 2rem; /* 32px */
  --space-10: 2.5rem; /* 40px */
  --space-12: 3rem; /* 48px */
  --space-16: 4rem; /* 64px */
  --space-20: 5rem; /* 80px */
  --space-24: 6rem; /* 96px */

  /* Radius */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 999px;

  /* Shadows (subtle, minimal for trustworthy UI) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.28);
  --shadow-md: 0 18px 45px rgba(0, 0, 0, 0.35);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 180ms ease-out;
  --transition-slow: 240ms ease-out;
}

/* ========================================================================
   Reset / Normalize
   ======================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
}

img,
svg,
video,
canvas,
iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

picture {
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border-radius: 0;
}

button {
  border: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ========================================================================
   Base
   ======================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-background);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

h1,
 h2,
 h3,
 h4,
 h5,
 h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-gray-50);
}

h1 {
  font-size: clamp(2.2rem, 3vw, 2.6rem);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.8rem, 2.2vw, 2.1rem);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: 1.4rem;
  margin-bottom: var(--space-2);
}

h4 {
  font-size: 1.2rem;
  margin-bottom: var(--space-2);
}

h5 {
  font-size: 1.05rem;
  margin-bottom: var(--space-1);
}

h6 {
  font-size: 0.9rem;
  margin-bottom: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

strong,
 b {
  font-weight: 600;
}

em,
 i {
  font-style: italic;
}

a {
  color: var(--color-primary-soft);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-success);
}

a:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 2px;
}

code,
 pre {
  font-family: var(--font-mono);
}

pre {
  overflow-x: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-6) 0;
}

/* ========================================================================
   Utilities
   ======================================================================== */

/* Layout containers */
.container {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--space-4);
  max-width: 1120px;
}

@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

.section {
  padding-block: var(--space-10);
}

.section--tight {
  padding-block: var(--space-6);
}

/* Grid helpers */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--responsive {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

@media (max-width: 768px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

/* Flexbox helpers */
.flex {
  display: flex;
}

.flex-row {
  flex-direction: row;
}

.flex-column {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

.gap-4 {
  gap: var(--space-4);
}

/* Spacing utilities (minimal set) */
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-6 { margin-bottom: var(--space-6); }
.pt-4 { padding-top: var(--space-4); }
.pb-4 { padding-bottom: var(--space-4); }

/* Text utilities */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-sm {
  font-size: var(--font-size-sm);
}

.text-xs {
  font-size: var(--font-size-xs);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-2);
  padding-block: 2px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.badge--success {
  background-color: var(--color-success-soft);
  color: var(--color-success);
}

.badge--warning {
  background-color: var(--color-warning-soft);
  color: var(--color-warning);
}

.badge--danger {
  background-color: var(--color-danger-soft);
  color: var(--color-danger);
}

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========================================================================
   Components
   ======================================================================== */

/* Buttons - primary CTA: emphasise clear action, high contrast */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding-inline: var(--space-4);
  padding-block: 0.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-fast);
}

.button--primary {
  background: linear-gradient(135deg, var(--color-success), #16a34a);
  color: var(--color-primary-contrast);
  box-shadow: var(--shadow-sm);
}

.button--primary:hover {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--color-primary-contrast);
}

.button--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.button--secondary {
  background-color: rgba(15, 23, 42, 0.9);
  border-color: var(--color-border-subtle);
  color: var(--color-text);
}

.button--secondary:hover {
  background-color: #111827;
  border-color: var(--color-success);
}

.button--ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-text-muted);
}

.button--ghost:hover {
  background-color: rgba(15, 23, 42, 0.85);
  color: var(--color-text);
}

.button:disabled,
.button[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.button:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 2px;
}

/* Inputs and form controls */
.input,
.select,
.textarea {
  width: 100%;
  padding-inline: var(--space-3);
  padding-block: 0.55rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(15, 23, 42, 0.95);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-gray-500);
}

.input:focus-visible,
.select:focus-visible,
.textarea:focus-visible {
  outline: none;
  border-color: var(--color-success);
  box-shadow: 0 0 0 1px var(--color-success-soft);
}

.input:disabled,
.select:disabled,
.textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.label {
  display: inline-flex;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-gray-400);
}

.form-field {
  margin-bottom: var(--space-4);
}

.form-helper {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* Card - ideal for comparison-style betting offers */
.card {
  background: radial-gradient(circle at top left, #111827 0, #020617 54%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.12);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  gap: var(--space-3);
}

.card--compact {
  padding: var(--space-4);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card__body {
  display: grid;
  gap: var(--space-3);
}

.card__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: baseline;
}

.card__meta-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-500);
}

.card__meta-value {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.card__footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

@media (max-width: 640px) {
  .card {
    padding: var(--space-4);
  }

  .card__footer {
    flex-direction: column;
    align-items: stretch;
  }
}

/* Offer comparison specific helpers (generic naming) */
.offer-flag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-success);
}

.offer-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.offer-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-3);
}

.offer-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* Tables (for structured odds/terms if needed) */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-2);
  text-align: left;
}

.table thead th {
  border-bottom: 1px solid var(--color-border-subtle);
  font-weight: 500;
  color: var(--color-gray-400);
  text-transform: uppercase;
  font-size: var(--font-size-xs);
  letter-spacing: 0.05em;
}

.table tbody tr + tr {
  border-top: 1px solid rgba(31, 41, 55, 0.85);
}

.table tbody tr:hover {
  background-color: rgba(15, 23, 42, 0.75);
}

/* Navigation shell */
.site-header {
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
  background: linear-gradient(to bottom, #020617, rgba(2, 6, 23, 0.92));
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.site-logo {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
}

.site-nav a {
  color: var(--color-text-muted);
  padding-block: 2px;
}

.site-nav a:hover {
  color: var(--color-text);
}

.site-nav a[aria-current="page"] {
  color: var(--color-success);
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  padding-block: var(--space-6);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 640px) {
  .site-footer__meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ========================================================================
   Accessibility & Motion
   ======================================================================== */

:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}